Dyestuffs and process of manufacturing the same.



"UNI-fEDiSTA TEs PATENT OFFICE.

.. gigwim cm rm, OF SHARON,'AND EMII, LESSER, OF BOSTON, MASSACHUSETTS,

"in; i a d a v u (w; 2; ..lt31filent ,of ,Sharon, Nortolkcounty, Massachusetts, and .E i1L.LEssnn,a citizen of the United States, 'and a resident of Boston,

f ,zedcelrtain new flandmseful .Improve 'nents in Dyestuffs and- Processes of ivlanntacturing ..;,dyes't ufis;'and t0 .thfipprocess of producing itheysame by poiiplingdiazotized amido sulsubstance (Zl107blt8h.,1895,11-6,, 909;9l0) 'hy oxidizing acetyl-methyl-hma to'xylin with acid in acetic acid'solution- It may. be made :in the manner discovered lgy \V. H. Perkin, =s(.-T1-ans. 1902.; 81. '.1o0s-10ce). v a

- .VVe have Ydiscoyered that certain diazotized amido-sulfienic lilCldS .when coupled thalenesulfonic acids; for "naphtliylamin-sulfonic acid. LS-naphthyl- 'am'in-sulfonic acid, a mixture, of L6- and 1.7- naphthylamin-sulfonic acid, 1.3.6.8an1ido.

I sultonic acid, and have obtained satisfactory results; These products are all characterized by the fact that they are soluble in water and ii'il'l color animal fiber in an acidhaihythat they are all soluble in hydrochloric acid,

" acid all dissolve/With a brown or brownish toxylone will if'orn'razo dyestuffs. We have thus coupled the, (haze compounds of amidetroduced "into the acidified dyebath of the ASSIGNQ rofhMERIcK-N DYEWOGD COMPANY, or NEW YORK, N. Y., A core DYESTUIE'FSX-MND"PROCESS OF MANUFACTURING... TI 'IE SAME.

- Hita Specification of Letters Patent. f Patented A 11 1914 Application filed December 20, 1910. Serial No. 598,363.

0010;, the silk is more heavily dyed than the woo These dyestuffs, give colors of various shades, for instance: Amido-azo-benzenedisulfonic acid will give a dark red, violet tone; a mixture of 1.6- and 1.7-amido-naphthalin-sulfonic acid, Cleves acid, dark red to black brown; 1.5 naphthylamin. sulfonic acid, L acid, dark red; 1.3.6.8-amido-oxydisulfonic acid, H acid, black violet; 2.6- naphthylamin-sulfonic acid, Bronners acid, dark red; 2.6.8-B-naphthylamin-di-sulfonate, potassium salt, amido G salt, rich purplish red.

The following examples will serve to illus trate the manner in which azo dyestufi's may be produced by our process:

Example I Color made by combining zlz'azotizccl paraomido-benzene-s-ulfomlc acid and alpha anhydr'atetra methyl hemat0m 1 l0ne.5.8 gr. para-amido-benzene-sultonic acid (sulfanilic acid) (previously dried at 100) was dissolved with an addition of cc. NaHO 24% in 200. cc. cold water. To this solution were added 10. cc. HCl. Sp. gr. and the clear liquor diazo fixed with 2.4 gr. NaNO, dissolved in 25 cc. water. The whole was kept cool by ice at a temperature of 4 and after the addition of all NaNO left for 10 min., when a test with iodid starch paper showed a slight coloration. On the other hand 13,7 gr. alpha-anhydro-tetra-methyl-hematoxylone, 20., cc. NaHO 24% and 200. cc. water were mixed to a thin pastein the stirring apparatus. To

this paste was added in a slow continuous stream with constant stirring the diazotized compound. The whole kept its alkalinity throughoutthe ll hours stirring, after which time 125.,cc. HCl 1.2 sp. gr. were added and the stirring continued. for 10 min. The pasty liquor was then filtered on the pump, the color-precipitate dried on the water-hath and ground up.

The color formed from sulfanilic acid ,and :alpha.-anhydro-tetra-methyl-hematoxy- .lo'ne is a greenish black powder. It dissolves in water and alcohol to a deep red solution; is soluble in concentrated sulfuric acid to a Zen -of, the United States, and a Sufiol-k county Massachusetts. have invent;

the Same; ofjwhichthe following is a specification,

l ates to. certain new azo fonic acids [with al ha-anhydro tetra.- methyhhenia toxylene ,This last named rstf; prepared by Herzig chrornie with alpha.a anhydro tetra methyl hemahenzene' sulfonic acids, as, for instance, paraamido-benzene-sulfonic acid and amidoazobenzenedisulfon'ic"acid; also amido-naphinstance: 1.4-

o'xy di -sulfonic' acid, Q.6-naphthylamin-Sultonic acid, and 2.6.8-hetanapl'ithylannn-dinitric acid, caustic soda, and water, although in some cases only sparingly: that lll nitric color,and in caustic soda on dilution with \vater with a color contaii'iing some shade of red. Silk is died by them more readily than; wool. When silkand wool are'together in-.

concentrated nitric acid to a dark brown color; and is soluble in 5 and 10% solutions of caustic soda to a dark red color.

Emample [1. Color made by combining diazotz'zed 1.4-mphtb/yZamin-su-Zf0nic acid with alpha-anhydro-tetra-methyl-hematowylone.,l0.6 gr. sodium naphthionate were dissolved in 250. cc. cold water and after adding 8.4 cc. 1101. 1.2 sp.'gr., the whole cooled down to. 5 and dlazotized with 2.4 gr.

NaNO dissolved in 25 cc. water. The whole was left cold (at'10) for 1 hour, after which time nitrous acid could be still detected, al-- though very faintly, with iodid starch paper. A ellow thin paste was thus formed and ad ed to the second compound in the stirring machine. This compound was made up by making to a thin paste 13.7 gr. alpha-anhydrotetra-methyl-hematoxylone with 200. cc. water and 20. cc. NaOH 24%. The whole was stirred for 1; hours, durin which time it kept its alkalinity. The llquor was then acidified with 'HCl. 1.2 sp. gr. in the proportion of about 1520 cc. HCl. for each 100 cc. of liquor, stirred for 5 minutes and left to settle. The coloring matter settled as a fine dark-red precipitate, which could be easily filtered on a pump into a cake; the filtered li nor was perfectl clear.

The-color forme from 1.4-naphthylaminsulfonic acid and alpha-anhydro-tetramethyl-hematoxylone is a dark brown powder. It dissolves in Water and alcohol yielding bluish red solutions; is soluble in concentrated sulfuric acid to a deep blue solution, turning red on the addition of water; in concentrated nitric acid it is soluble to a dark brown color; in concentrated hydrochloric acid it dissolves sparingly; and in a five or ten per cent. solution of caustic soda;

it is soluble to a brownish color.

We have found that similar results may be obtained by substituting for the alpha anhydro-tetra-methyl-hematoxlyone its betaisomer, but that the reactions do not proceed as smoothly. These isomers must be regarded as chemical equivalents.

We desire to have it understood that when we refer in our claims to the product or products obtainable by the method hereinbefore described, we intend to claim the product or products broadly, no matter by what process they may be produced, provided that they possess the following characteristics: Either that they may be made by any process, and are soluble in hydrochloric acid, nitric acid, caustic soda, and water, although in some cases only sparingly, and will dissolve in nitric acid with a brownish color, and in caustic soda on dilu tion with water with a, color containing some shade of red, or that they actually have been made by our-process;

We claim:

1. The process of making an azo dyestufi, which .consists in con ling. a diazotized amido-sulfonic acid wit an anhydro-tetramethyl-hematoxylone.

2. The process of making an azo dyestuif which consists in coupling a diazotized amido-sulfonic acid with an alpha-anhydrotetra-methyl-hematoxylone.

3. The process of making an azo dyestulf which consistsin coupling a 'diazotized amido-naphthalene-sulfonic acid with an anhydro-tetra-meth l-hematoxylone.

4. The process 0 making an azo dyestulf which consists 'in coupling a diazotized amido naphthalene-sulfonic acid with an 'alpha-anhydro-tetra-methyl-hematoxylone.

' 5. The process of making an azo dyestufi which consists in coupling diazotized alphanaphthylamin-sulfonic acid-1.4 with an 'anhydro-tetra-methyl-hematoxlyone.

6. The process of making an azo dyestuif which consists in coupling diazotized alphanaphthylamin-sul'fonic acid-1.4 with alphaanhydro-tetra-methyl-hematoxylone.

7. The ,new azo dyestufls which can be obta'ined by coupling a diazotized amido-sulfonic-acid with alpha-anhydro-tetra-methyls hematoxylone and characterized by the fact that they are soluble in water and will color animal fiber in anacid bath; that they are all soluble in hydrochloric acid, nitric acid, caustic soda, and water, although in somecases only sparingly; that in nitric acid all dissolve with a brown or brownish color, and in caustic soda on dilution with .water and that silk is dyed by them more readily than wool.

8. The new azo dyestuffs which can be obtained by coupling a diazotized amidonaphthalene-sulfonic acid with alpha-anhydro-tetra methyl-hemat-ox lone and characterized by the fact that they are soluble in water and will color animal fiber in an acid bath; that they are all soluble in hydrochloric acid, nitric acid, caustic soda, and water,. although in some cases only'sparingly; that in nitric acid all dissolve with a brown or brownish color, and in caustic soda oirdilu- *with'a colorv containing some shade of red,

tion with water with a color containing some shade of red, and that silk is dyed by them more readily than wool.

9. The new azo dyestuff which lean be obtained by coupling diazotized 1.4*- naphthylamin-sulfonic acid with alpha-anhydrotetra-methyl-hematoxylone, and may be recognized by the following characteristics: It is dark brown in color, dissolves in water and alcohol yielding bluish red solutions; is

soluble in concentrated sulfuric acid to a; deep blue solution, turning red on the addition of water; in concentrated nitric acid it dissolves to a dark brown color; in concen- 5 trated hydrochloric acid it dissolves sparingly; and in five and ten per cent. solutions of caustic soda it IS soluble to a brownish red color.

In witness whereof we have hereuntoset our hands 1n the presence of two subscribmg 10 witnesses.

EDWARD S. CHAPIN. EMIL LESSER. Witnesses:

SAMUEL P. MUL'LIKEN, ELIZABETH C. SAUL. 

